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  2. chubbs
    Here's a closer look at the statistics of the Coatesville and Phoenixville post war moves. Differences between stations was removed by setting 1945 to zero to facilitate comparison between stations. Coatesville and Phoenixville behaved differently than the other stations, cooling relative to the other stations at the time of the moves; and, remaining cooler after the moves.. Using the temperature difference between 1945 and 1952 as a metric, Coatesville and Phoenixville are significantly different from 11 stations without station changes. The P value is 0.0001 which means that there is virtually no chance that Phoenixville and Coatesville are the same as the other 11 stations. Furthermore Phoenixville and Coatesville are significantly different from the other stations in every year after the moves in this period. Finally note also the good agreement among the 11 stations without changes. Chester County shares the same weather with a much larger region. Many stations can provide useful information on the Chester County COOP stations; which makes the identification of Chester County station changes very robust.
  3. vortex95
    I did not want to bring up the "feels like" temp, as that is out of control as to abuse, but it can be of use b/c "the door swings both ways!" Once you get below 57 or 58 dew point, the heat index is actually lower than the air temp! I would bet not many mets know or actively realize this. I did not know until about 10 years ago! I've spoken to ppl deployed in the Middle East, they can get perspective! After in that sauna for a few months, coming home, 95 feels great! Acclimation I think is underrated. When I moved to DC, it took me a few summers to get used to the more 90 temps and the more persistent high dew point, which get into the upper 70s more common here. By my 3rd summer, I not longer noticed it. I adapted. However, the flip side is that I am not as tolerant to cold. This past winter was by far the coldest here since I moved here, and I noticed! I think from the general public POV, they think MT is "cold." Most have zero idea what continental climate is like, and MT is the best state for temp swings in the CONUS. It is the only state in the Lower 48 that has had sig snow at lower elevations (I am taking Great Falls proper) in August (happened in 1992). It's even worse for AK. Ppl are shocked to learn AK highest temps is 100 F, and that they get a lot tstms (all squeezed into J-J-A). Some locations get 30 days w/ thunder, more than a lot of New England! And of course, tornadoes. We had that one earlier this month, but I would bet good $$ there are 3-5 tornado in AK each year, just it is so large and sparsely populated, it precludes detection.
  4. psv88
    Getting destroyed out here. Firehose off the ocean. Up to 1.67”. As usual those calling bust 2 hours into an event look foolish
  5. vortex95
    EF0 passes close to ineedsnow house will make it EPIC!
  6. Nomz
    I wasn't alive then, doesn't count
  7. Today
  8. ineedsnow
    Someone is going to get obliterated today.. the hype looks warranted this time..
  9. vortex95
    W/ that sat imagery I bet it was stronger than 125 kt. Pinhole eyes often suggest higher, but Dvorak has nothing to account for eye diameters or tight systems, esp. when the inner core is tiny. We generally underestimate the most intense TCs and small TCs from satellite estimate.
  10. vortex95
    More ern NY currently!
  11. CoastalWx
    Here it comes for SWCT. Just as we suspected.
  12. Chrisrotary12
    This thing hangs out over water long enough NHC will give it a name.
  13. vortex95
    04z HRRR rides a 996 mb low into cntrl CT (makes "landfall") later this morning. This is how the BDL F4 occurred on 10/3/1979. Sfc low from S of LI came up from the S and moving right over cntrl CT. Did WxWiz even get a hint of this before going to bed? I know CoastalWx did not, and now be like, "HUH????, where did this come from?! I was focused on all the rain!" Sooo...has anyone looked at the svr wx parameters? They are sneaky impressive. From 04z HRRR: 1) CAPE values NE of the sfc (meso?) low. 500-1000. That's more than enough when low-level shear is solid (see below). 2) 0-3 km CAPE - areas of 200+ CT/RI border to srn NH - again, more than enough (75 or more is good). 3) Now this is where it gets interesting. 0-1 km SRH NE of sfc low, large area of 200 w/ a max of 447 at 17z over NW RI! That is crazy and no reason this is spurious given the set up and evolution here. 4) SCP and SIGTOR area are there. Not honkin' but that's due to low CAPE largely. Low CAPE/high shear can do some amazing things! 4) Sim radar shows discrete cells in an arcing line NE of the sfc low. NE of sfc lows (synoptic, meso, or tropical) are prime areas for spinners. You have low CAPE in the column, but its more than enough for stout convective updrafts, 0-3 km CAPE is high so there is your low-level vortex stretching, and 0-1 km SRH is excellent. SPC 06z outlook has gen tstms only for the NE. I don't know about that. And yes, the small low pressure is already there off the NJ coast (radar attached).
  14. metagraphica
  15. vortex95
    996 mb for a coastal low is quite impressive for July here. And it's tight little sucker! Going see some big rain from this esp. since CAPE are 500-1000 over srn New England for most of the event. Those are ideal values for max rainfall rates and warm rain processes.
  16. vortex95
    Things turned out close to what the models where showing, at least for the DC area Plenty of wind reports, some hail, and one tor so far. Odd, a lack of svr reports in the RIC area and much of cntrl VA, where the highest tor probs were initially. I had a quick 1.00" even of rain (WxU site just up the street) and it got quite windy, but no damage in my immediate area. Kind of avg for a storm.
  17. vortex95
    Radar loop from 2000 to 2230z here. You had a line w/ the pre-frontal trof moving SE and isolated storms moving NE ahead of it, and some were supercells, esp. those one just E of the bay. One clearly split and one produced the tor in Trappe.
  18. NEG NAO
    Everyone east of the Hudson take a look at your radars - you are about to receive steady heavy rain as a long stream of moderate to heavy rain is moving up the coast and extends south all the way to the Carolinas and the developing low dropping into the trough will develop further just off the coast and draw all this moisture into it - an unusual set up for late July
  19. Mr Senior
    Received 3.75" of rain Tuesday. 2.55" on Monday for 2 day total of 6.30 inches of rain. Have had 13.73" so far for July.
  20. Amped
    It does on the Hrrr, just takes like 8 to 12hrs. Edit HRRR takes a 996mb low into New Haven this run and 5" for most of Faifield County.
  21. Chinook
    I believe Supertyphoon Dolphin was up to 125kt/145mph today but is now down to 120kt/138mph. This is from about 12 hrs ago when the overall presentation looked the best
  22. high risk
    It was interesting how the overnight runs looked pretty good, and then the 12Z suite (and a HRRR cycle or two after that) didn't look as good, before the HRRR locked on to the solution by late morning. And I'll be curious to see how many tornadoes are actually found. There were probably way more warnings than needed, but I'm wondering if they'll find more than the current count of one (good video of a tornado on the Eastern Shore north of Cambridge). Ultimately, we probably weren't far off from a more significant tornado event, but as you suggested in your post, the low-level winds were probably just a bit too weak, although I think that the low-level profile was slightly better than what the RRFS and GFS/ECMWF were suggesting last night.
  23. WinterWolf
    Is that stuff down off NJ and Delaware supposed to rotate up in here?
  24. NJwx85
    Huge area of backbuikding over Bergen, headed this way.
  25. high risk
    The guidance trends were really interesting. Things were looking encouraging for fairly significant storms in the early runs on Tuesday, and then the cycles right after the raob data became available looked fairly lousy (as noted in your post). Then, the HRRR started locking in again on the more significant solutions.
  26. jm1220
    Latest HRRR has some decent rain for LI overnight and some intensification with the developing low. So far I think there's been a 30 second shower here.
  27. NJwx85
    There’s some back building on radar.
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